The Chrome PDF plugin is not free software, but there are several free pdf plugins that used to work just fine. They dropped the interface. -1, the information is incomplete and misleading.
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Jan HudecAug 21 '14 at 7:26

This command downloads a script I wrote which will download the latest version of Chrome, pull out the PDF library, install it (which will require root password), and then it will delete itself. You can run this at any time to update to the latest stable version of Google's PDF library.

After running this command, make sure you restart Chromium and enable the plugin in chrome://plugins/.